The Chris vs. Chris battle has escalated. Marvel heroes Chris Pratt and Chris Evans have raised the stakes in their Super Bowl showdown, each agreeing to dress up as his respective superhero during a visit to a charity of the other actor's choosing.

It's all unfolding on Twitter. If the Seattle Seahawks win, Pratt, who grew up near the Emerald City, publicly challenged Evans to dress up as Captain America and then visit the Seattle Children's Hospital, waving a Seahawks flag.